<?php

class labelsGmail
{
    function listLabels($service)
    {
        $labels = array();
        try {
            $labelsResponse = $service->users_labels->listUsersLabels('me');
            if ($labelsResponse->getLabels()) {
                $labels = array_merge($labels, $labelsResponse->getLabels());
            }
        } catch (Exception $e) {
            print 'An error occurred: ' . $e->getMessage();
        }
        return $labels;
    }

    /**
     * Modify the Labels a Message is associated with.
     *
     * @param  Google_Service_Gmail $service Authorized Gmail API instance.
     * @param  string $userId User's email address. The special value 'me'
     * can be used to indicate the authenticated user.
     * @param  string $messageId ID of Message to modify.
     * @param  array $labelsToAdd Array of Labels to add.
     * @param  array $labelsToRemove Array of Labels to remove.
     */
    function modifyMessage($service, $userId, $messageId, $labelsToAdd, $labelsToRemove) {
        $mods = new Google_Service_Gmail_ModifyMessageRequest();
        $mods->setAddLabelIds($labelsToAdd);
        $mods->setRemoveLabelIds($labelsToRemove);
        try {
            $message = $service->users_messages->modify($userId, $messageId, $mods);
        } catch (Exception $e) {
            print 'An error occurred: ' . $e->getMessage();
        }
    }

    /**
     * Get list of Messages in user's mailbox.
     *
     * @param  Google_Service_Gmail $service Authorized Gmail API instance.
     * @param  string $userId User's email address. The special value 'me'
     * can be used to indicate the authenticated user.
     * @return array Array of Messages.
     */
    function listMessages($service, $userId, $query, $labels) {
        $pageToken = NULL;
        $messages = array();
        $opt_param = array();
        do {
            try {
                if ($pageToken) {
                    $opt_param['pageToken'] = $pageToken;
                }
                $opt_param['labelIds'] = $labels;
                $opt_param['q'] = $query;
                $opt_param['maxResults'] = 3;
                $messagesResponse = $service->users_messages->listUsersMessages($userId, $opt_param);
                if ($messagesResponse->getMessages()) {
                    $messages = array_merge($messages, $messagesResponse->getMessages());
                }
            } catch (Exception $e) {
                print 'An error occurred: ' . $e->getMessage();
            }
        } while ($pageToken);

        return $messages;
    }

    function setLabels($caseId, $index, $actualLastIndex, $unassigned=false){
        //First getting the actual thread data
        $Pmgmail = new \ProcessMaker\BusinessModel\Pmgmail();
        $appData = $Pmgmail->getAppData($caseId, $index);

        foreach ($appData as $application){
            $appNumber = $application['APP_NUMBER'];
            $index = $application['DEL_INDEX'];
            $threadUsr = $application['USR_UID'];
            $proName = $application['APP_PRO_TITLE'];
            $threadStatus = $application['DEL_THREAD_STATUS'];
        }

        if($threadStatus == 'CLOSED' || $unassigned == true){
            //Getting the privious User email
            $oUsers = new \Users();

            $usrData = $oUsers->loadDetails($threadUsr);
            $mail = $usrData['USR_EMAIL'];

            //The Subject to search the email
            $subject = "[PM] " .$proName. " Case: ". $appNumber;

            require_once PATH_TRUNK . 'vendor' . PATH_SEP . 'google' . PATH_SEP . 'apiclient' . PATH_SEP . 'src' . PATH_SEP . 'Google' . PATH_SEP . 'autoload.php';
            require_once (PATH_HOME . "engine" . PATH_SEP . "classes" . PATH_SEP . "class.pmGoogleApi.php");
            $pmGoogle = new PMGoogleApi();

            $pmGoogle->setUser($mail);

            $pmGoogle->setScope('https://www.googleapis.com/auth/gmail.modify');
            $client = $pmGoogle->serviceClient();

            $service = new Google_Service_Gmail($client);

            //getting all the label's ids of the user's mail
            $listlabels = $this->listLabels($service);

            foreach ($listlabels as $label) {
                $labId =  $label->getId();
                $labName = $label->getName();
                switch($labName){
                    case "* Inbox":
                        $idLabInbox = $labId;
                        break;
                    case "* Participated":
                        $idLabParticipated = $labId;
                        break;
                    case "* Unassigned":
                        $idLabUnassigned = $labId;
                        break;
                    case "* Draft":
                        $idLabDraft = $labId;
                        break;
                    case "* Paused":
                        $idLabPaused = $labId;
                        break;
                }
            }

            if($actualLastIndex == 0){
                $labelsToRemove = $idLabDraft;
                $labelsToSearch = "*-draft";
                $labelsToAdd = $idLabParticipated;
            } else if ( ($actualLastIndex == -1) && ($unassigned == true) ){ //Unassigned
                $labelsToRemove = $idLabUnassigned;
                $labelsToSearch = "*-unassigned";
                $labelsToAdd = $idLabInbox;
            } else if($actualLastIndex >= 1) {
                $labelsToRemove = $idLabInbox;
                $labelsToSearch = "*-inbox";
                $labelsToAdd = $idLabParticipated;
            }

            //Searching the email in the user's mail
            $q = "subject:('".preg_quote($subject, '-')."') label:('".$labelsToSearch."')";

            $messageList = $this->listMessages($service, $mail, $q, $labelsToRemove);

            foreach ($messageList as $message) {
                $messageId = $message->getId();

                $modifyResult = $this->modifyMessage($service, $mail, $messageId, array($labelsToAdd), array($labelsToRemove));

            }
        }
    }
    
    /**
     * Delete Label with given ID.
     *
     * @param  Google_Service_Gmail $service Authorized Gmail API instance.
     * @param  string $userId User's email address. The special value 'me'
     * can be used to indicate the authenticated user.
     * @param  string $labelId Id of Label to be updated.
     */
    public function deleteLabel($service, $user, $labelId)
    {
    	try {
    		$service->users_labels->delete($user, $labelId);
    	} catch (Exception $e) {
    		error_log('An error deleting gmail labels occurred: '.$e->getMessage());
    	}
    }
    
    /**
     * Delete PMGmail integration labels getting the list of labels in an email account.
     * @param string $mail User mail adress.
     *
     */
    public function deletePMGmailLabels($mail)
    {
    	require_once (PATH_HOME . "engine" . PATH_SEP . "classes" . PATH_SEP . "class.pmGoogleApi.php");
    	$pmGoogle = new PMGoogleApi();
    
    	$pmGoogle->setUser($mail);
    
    	$pmGoogle->setScope('https://www.googleapis.com/auth/gmail.modify');
    	$client = $pmGoogle->serviceClient();
    
    	$service = new Google_Service_Gmail($client);
    	$count = 0;
    	$listlabels = $this->listLabels($service);
    	foreach ($listlabels as $label) {
    		if ($label->getName() == '* Inbox' ||
    				$label->getName() == '* Participated' ||
    				$label->getName() == '* Unassigned' ||
    				$label->getName() == '* Draft' ||
    				$label->getName() == '* Inbox' ||
    				$label->getName() == '--- ProcessMaker ---' ||
    				$label->getName() == '* Paused'
    		) {
    			$oresp = $this->deleteLabel($service, 'me', $label->getId());
    			$count++;
    		}
    	}
    	return $count . ' labels successfully deleted.';
    }

}